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Get started1 Cefn Cwellyn is an end-of-terrace house in Rhyd Ddu, Caernarfon, Caernarfon (LL54 6TP). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (January 2026) shows a C (score 70). When first surveyed in October 2025 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Poor to Average. Main heating runs on dual fuel. This certificate was lodged in the last six months, so the rating reflects current condition.
On energy efficiency it sits in the top 10% of properties in this postcode. One historical planning record sits against the property in 2018.
1 Cefn Cwellyn ranks among the most efficient homes in the postcode for energy use.
Structural refurbishment including installation of external cladding
1 Cefn Cwellyn has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£130,000
Modelled from EPC, postcode comparables.
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
1 Cefn Cwellyn outperforms the street on epc rating by a wide margin.
EPC Rating
70 (C)
Street avg 48 (E)
Floor Area
80 m²
Street avg 88 m²
CO₂ Emissions
1.4 t/year
Street avg 5.2 t/year
Rail-style transport is unusually close for this postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Cwellyn Arms — bus stop.
Changes detected from historical EPC data
Hot water system upgraded
Solar water heating installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Median price across the last 5 sales in LL54 6TP: £225,000 (2018–2003).
Habitable Rooms
5 rooms
Street avg 5 rooms